NATS 1540 Chapter Notes - Chapter 1-30: Snowball Earth
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Document Summary
Theia: hypothesized planet in the early solar system that apparently collided with the early earth (known as gaia) Theia (about half of earth"s size) collided with young earth ripping away huge sections of the earth"s crust and shooting millions of tons of molten rock and debris out into. 50-100 years later, this debris & molten rock is said to have formed the moon. Fossil corals have 410 growth lines a year leading us to believe there used to be 410 days in a year when these corals were alive. 400 million years ago, days lasted for 21 hours instead of 24 hours - means the earth must have spun much faster than today. After earth"s collision with theia, the earth was bombarded with comets formed from ice which soon melted and formed the first oceans. At this time, the earth was spinning 4 times faster which caused.
